The study investigates the influence of vehicle breakdowns on urban traffic flow, focusing specifically on incidents occurring mid-block on roads in New Delhi. Primary data were collected to assess traffic volume, vehicle composition, speed, delays, and other flow characteristics. This data was utilized to create a simulation model using VISSIM, which was then calibrated and validated to estimate the impact of vehicle breakdowns. The impact was measured in terms of changes in speed, traffic volume, and the extent of disruption in both distance and time. Simulation results indicate that breakdowns on a 2-lane road significantly affect speed more than those on a 3-lane road. Additionally, the percentage change in traffic volume is notably greater on 2-lane roads compared to 3-lane roads. This suggests that mid-block breakdowns on two-lane roads result in more severe traffic volume reductions, particularly at Location-2.